netstat -nr
That's your routing table. By default, when an interface comes up on an IP, an interface route is added through that interface for that IP network - so if your eth0 came up on 10.0.1.2/24, you'd see a route in there for 10.0.1.0/24 through eth0 - then there is the default (0.0.0.0) route. That's usually the route that matches any network that is not directly connected. So if you had a default route through say 10.0.1.1, your internet traffic would want to be routed thru 10.0.1.1 - to get to 10.0.1.1, IP knows that it has to use eth0, so the traffic goes out eth0 destined for 10.0.1.1.
Or maybe you're just asking about where the NIC's get configured? That info is in /etc/sysconfig/network-scripts - check out ifcfg-* in that directory. Also, your default route is set by the GATEWAY entry in /etc/sysconfig/network.
Hope this helps! Martin
Timothy J. Miller wrote:
When a system has 2 network cards that are on the same network, how does FC1 select which NIC to use? By that I mean, Mozilla starts up, what causes it to use one card, say eth1 over eth0? Anyone know?
Thanks
- Tim
